F3B rules says in paragraph 5.3.2.2. Launching,  figure f) The battery must not be charged on the launching line. The motor must not be cooled, and the battery must not be heated.

At F3B Kirchheim I had interesting talk to Michael Wohlfahrt and Thomas Shorb. I was claiming that they are charging batteries on winch line i.e. in space where is all that bloody F3B stuff placed (all boxes, spare lines, tripods  etc.)  Please note that I try to distinguish two different things; launching line and winchline. Bellow I will explain why.

First let’s define what is launching line.  When trying understand the rule it’s narrow space where all winches are placed or fixed to ground. Here you can NOT charge your winch batteries, while you could use it as additional source of power during launch-and this is core meaning of paragraph 5.3.2.2. f)!

Rule says nothing about charging batteries in safety area. Winch line is safety area and therefore you CAN charge there your batteries. Maybe it will be a bit more comfortable to transport one battery (as master source battery) forth and back than all of five, six batteries(?) On the other hand I can imagine one day when people are jumping over sparkling chargers on winch line not even talking about running generators (I know a bit absurd idea).

Some of you just became happy VV Model Stinger owners. I have few hints when setting up this blazing fast F3X toy. I fly Stingers more than year.

Wiring diagram. I use this system since ever in my F3X toys. It's simple, light, space saving and reliable.